CVE-2023-2816 Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner

What is CVE-2023-2816?

CVE-2023-2816 is a high-severity missing authorization vulnerability in HashiCorp Consul, published on 2 Jun 2023. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Consul and Consul Enterprise allowed any user with service:write permissions to use Envoy extensions configured via service-defaults to patch remote proxy instances that target the configured service, regardless of whether the user has permission to modify the service(s) corresponding to those modified proxies.

Weakness: CWE-266

Which versions are affected by CVE-2023-2816?

4 open source packages ship an affected version, including github.com/hashicorp/consul and consul. It affects 1 product.

Products include Hashicorp Consul.

How do I fix CVE-2023-2816?

Upgrade github.com/hashicorp/consul to 1.15.3 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-2816 being exploited?

There is no known exploitation of CVE-2023-2816 in the wild and no public exploit code.

Other vulnerabilities in HashiCorp Consul

• CVE-2021-41805 Privilege escalation in n/a High 8.8
• CVE-2021-37219 HashiCorp Consul Privilege Escalation Vulnerability High 8.8
• CVE-2024-10006 Consul L7 Intentions Vulnerable To Headers Bypass High 8.3
• CVE-2024-10005 Consul L7 Intentions Vulnerable To URL Path Bypass High 8.1
• CVE-2019-8336 HashiCorp Consul Access Restriction Bypass High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27396, AZL-35303, BIT-consul-2023-2816, GHSA-rqjq-ww83-wv5c, GO-2023-1828, UBUNTU-CVE-2023-2816.